feat(ui-lvgl): quick panel from the status bar; L2 fixes from rc1

The quick panel, as a phone's: pulled down from the status bar (or a tap
on it). Bluetooth, WiFi, GPS, sound, trail and live share switch at a
tap; Advert opens the advert popup (moved here from the Nodes header);
Lock locks the screen; a brightness slider. Holding a tile opens its
settings. Lock and sun glyphs added to the fonts.

Fixes from rc1 testing on the L2:
- GPS status icon: none when GPS is off (the module kept its last fix
  valid, so it stayed green); grey on, green with a fix. ensureGps()
  turns GPS on before trusting that stale fix.
- Screen wake: the panel wakes dark, a frame is drawn, then the
  backlight fades in -- no white flash. Off fades out first.
- Power off / flat battery: the chip wakes every 30 s to look for USB
  power and starts when plugged in (it slept with no wake source before,
  until the reset button). Plugged in when switched off: stays off until
  re-plugged.
- Message ages in a conversation refresh every 2 s, as on ui-new; the
  message popup keeps its age, repeaters heard and delivery up to date.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

examples/companion_radio/ui-lvgl/QuickScreen.h

@@ -1,5 +1,5 @@
 // Quick messages and placeholders (the compose bar's "+", Settings > Messages
-// & contacts > Quick messages), the advert button in Nodes' header, Settings > Bluetooth, and
+// & contacts > Quick messages), the advert popup (the quick panel's Advert), Settings > Bluetooth, and
 // Messages' "Read all". The text side is ui-core/MessageText.h.
 // Included by UITask.cpp (single translation unit).
 
@@ -62,7 +62,6 @@ static void onBtSwitch(lv_event_t* e) {
 
 }  // namespace qview
 
-static void onAdvertRow(lv_event_t* e)     { (void)e; s_ui->advertPopup(); }
 static void onOpenQuickMsgs(lv_event_t* e) { (void)e; s_ui->showQuickMsgs(); }
 
 // ── The compose bar's "+" ─────────────────────────────────────────────────────
@@ -189,7 +188,7 @@ void UITask::quickEditDone(bool ok) {
   }
 }
 
-// ── Nearby > advert ───────────────────────────────────────────────────────────
+// ── Advert (the quick panel) ─────────────────────────────────────────────────
 // Shows you (and your position, if shared) to other nodes: now, or on a timer
 // (the schema's PG_ADVERT page, ui-new's Tools > Auto-Advert).